Subtract 21/81 from 63/40
1st number: 1 23/40, 2nd number: 21/81
63/40 - 21/81 is 1421/1080.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
63/40 = 63 × 81/40 × 81 = 5103/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
21/81 = 21 × 40/81 × 40 = 840/3240 - Subtract the two like fractions:
5103/3240 - 840/3240 = 5103 - 840/3240 = 4263/3240 - After reducing the fraction, the answer is 1421/1080
- In mixed form: 1341/1080
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